Among Texas Democrats, Obama, the senator from Illinois, and Clinton, the senator from New York, were see-sawing back and forth. With 39 percent of the vote counted, Clinton led 51 percent to 49 percent.

With 55 percent of votes counted in Ohio, Clinton was leading 57 percent to 41 percent and was projected the winner by NBC and CNN.

Obama took Vermont and Clinton grabbed Rhode Island. Obama led in the delegate count 1,399 to 1,303.

Pundits have been saying Clinton would have to score knockouts in primaries in Texas and Ohio to remain a viable contender.